10BB 35W 12V Solar Panel High-Efficiency Monocrystalline PV Module Designed for Off Grid System, Charge Your Battery of RV, Boat, Camper, Trailer, Gate Opener

I can't say enough how impressed I am with the quality of this panel. Currently its been very overcast and I've only had it installed 2 days, but its putting out plenty of power for what I'm using it for. I have it hooked to 4 computer fans to vent the garage. At 10:30 AM with totally cloudy skies it was putting out 0.43amps and 15.3 volts to the fans. I will probably put higher amperage fans on to drop the voltage some. Update: I installed higher speed fans to use more of the power at 12:20PM with mostly sunny skies the panel is putting out 19.5 volts DC at 1.05 amps to the fans. This equals 20.5 watts at a voltage higher than the max power is rated at so needless to say I'm very impressed. These fans are rated at 121CFM at 24volts and I would guess at 19.5 they put out roughly 100CFM. I have four of them connected so I now have ~400CFM of high static pressure air flow for free :). It was packed perfectly my only warning is the taped side of the inner box had the glass towards the seam which I wouldn't have expected. I was very careful when cutting the tape, but if you were careless you could scratch the glass. The panel frame is very sturdy I made 2 notches in each in so I could mount it using hose clamps to a clothes line and this worked perfectly. The ends are double walled aluminum so you don't want to drill any closer than 1/4" from the end which I found out the hard way on my first hole drilling into the out double wall. The wires and sealing on the panel were all well done as well. There is a little slide door that lets you see the wire connections. Currently I'm not using a solar controller but used ultra plugs on all my cable connections so it would be easy to plug one in. Online it said power output drops to 10-25% of max on cloudy days I'm seeing 24.7% of max power under cloudy conditions at 10:30 AM so I'm quite happy with that. There is no sun visible through these clouds so its very cloudy and darned humid on top of it. The panel wires don't have any plug ends which I wouldn't have used anyway as I installed ultra plugs (Deans plugs). They are perfect for small projects and can handle up to 30amps which in this case is way overkill. https://www.amazon.com/Connectors-Battery-Female-Shrink-Tubing/dp/B01CWYFS4Y/ref=sr_1_10?keywords=ultra+plug&qid=1565546276&s=gateway&sr=8-10 So all I can say is super impressed overall. The poly solar crystals look so nice when you hold it sideways to the light I hated to mount in outside its practically a work of art lol.

Had a small low wattage panel, but it couldn't keep the battery charged for my gate opener. I bought this 30 watt low cost panel and a second battery, hooked it all up and it's been charging just fine in the month since I bought it. This is a 30 watt panel which is the max my gate opener system accepts. I did have A/C power for a backup, but by using over 100 feet of extension cord. The plan was to run electric to the gate opener, but this seemed like a much easier and cheaper option - and it was. Installation was slam dunk. You do need some kind of method to mount it at an angle since it doesn't come with a mount. Admittedly, it's summer and it's been sunny every day so we'll see if it keeps the batteries charged when a string of cloudy days shows up or if I have to bring out the extension cord again. However, so far it has not once shown any indication of not sufficiently charging the batteries which would be apparent by the gate opener getting weak and having difficulty opening or going out one morning and having the gate not operate at all. Things I've experienced all too often when I had that previous low wattage panel. It's done such a fine job so far that confidence is high that even consecutive cloudy days won't require me to go back to the extension cord backup. So far I see no reason to purchase an expensive $200 panel when this panel accomplishes the same task at a price so much lower.

I purchased this item to run a small fountain pump and charge a battery for automated nighttime use. It has been running since january 2020. Periodically I burn up a water pump and have a chance to check the voltage and amps. I load test it with a small fish tank heater with a shunted inline ammeter, while testing across the leads for voltage. I have never seen more than 22 watts of output, in Arizona with the panel perpendicular to the sun, which is completely sufficient in my situation, but is less than rated. Maybe if the panel was in space it would produce more power. That aside, it has endured blazing sun, temps well over 100, dust, bird droppings and occasional rain and monsoon hail for SIX Years and still works.

Panel arrived in good shape with no scratches, frame damage or hairline chip cracks. Output in full late afternoon sun was as specified. Small enough for the smaller needs while still providing decent output. Panel supplied with bare wire ends, which was fine as I was installing PowerPoles, anyway. Wire lead length was about 2-3 feet long. This worked well for my use, as I didn’t need longer leads, and it’s less voltage drop with the shorter wires. I plan to use the panel to charge various 20Ah and 35Ah batteries for use with an inverter during short power outages. Also have a 110Ah AGM deep cycle battery and 100W panel that when used with a 2000W inverter will run the fridge plus some extras for about 10 hours. The smaller batteries work for backup while the larger battery is charging. Plus the 30W panel can be paralleled with the 100W panel for better output in less than full sun. In the last 20 years we’ve never had power outages longer than 5-6 hours, so the planned system will handle expected needs. Less expensive than a generator (about half the cost or less of a Honda 2000 and no maintenance). I realize that there may be cloudy days during a power outage, but fuel supplies also run low, generators break/need maintenance, and stored fuel needs to be cycled through to prevent spoilage. Still may get a generator in the future. Also use the solar panels/batteries as backup and portable power for my ham radios. The smaller batteries and panel work best for this, as the 110Ah AGM deep cycle battery is a bit heavy. This panel works great for what I bought it for. Before buying a solar panel would recommend researching what’s required for your planned use (power needs, battery size, length of your wire run, panel sizes, whether a 24V/48V system with a step down controller may be better than 12V if using longer wire runs, portable or permanent use, etc.) so you don’t spend unneeded extra cash or end up with a cheap panel that doesn’t work well for what you need.

Excellent except intial power cord should be at least 6ft, bearly 2 inches beyond frame! intial power cord otherwise great! Using it to run a dual gate opening system with keyboard and automatic lock. Solar panel 12/24 volt solar controller, 75ah Deep Cycle Marine Battery Duracell from batteries plus. So far excellent. No more getting wet opening and closing the gate. Yayyyy!

Feels sturdy. Making 1.1 amp with partial sun, minor tree blockage, installation at 4pm. Replaced my US Automatic panel that wasn't making enough power with available sun and it was at least 10 years, probably 15+. Repurposed the bracket and added a 2" x 1/4" thick aluminum bar stock for increased length. Also bought a new US Automatic charge controller. They are working well together. Gate is happier.

I love this little solar panel! I use it to recharge a 12V lithium ion battery I take on my astronomy camping trips. You'll need a charge controller to use this, but they're pretty cheap and easy to find. Also I ended up cutting off the connector and soldering on a 5mm barrel plug to make it compatible with my system. I'm not sure what kind of products use the plug it came with. The aluminum frame is pretty robust and seems to be holding up great after a few years. Be careful where you set it, though, as the edges may scratch some materials. Even if it's not totally clear and out of the shade, this manages to keep my batteries topped off during the day so I can run my telescope fans and charge my phone all night long.

Good panel for charging my gate opener battery. Great value.